Brake-actuating mechanism



Jul 29, 1924.

. 1,503,350 R. E. C. DELEVOYE ,ET AL BRAKE ACTUAliING MECHANISM Filed Jan. 5, 1923 umauze Z;

El] i.

Eoarl' Emzle 5.

Mann 9L MAINE,

ANGIENS ETABLISSEME'NTS HOTCHKI FRANCE.

Application filed January Neuilly-sur-Seine, Seine, France, have invented new and useful Improvements in Brake-Actualting Mechanisms, of which the following is a specification. The present invention 7 actuating device for the front wheels of au- 'tomobiles and for other uses, said actuating device being constructed in such a manner as to eliminate the influence of the oscillations of the supporting springs on said actuating device itself, and consequently upon the braking action.

The actuating device according to the invention is characterised by the fact that there is interposed, in the transmission mechanism between the operating member and the braking device proper, a compensating mechanism, the displacement of which, caused by the the spring, neutralise the effects oftension and relaxation produced in the transmission mechanism by the oscillations of the spring.

This actuatingdevice can be realized in practice in various ways. In one of them, the brake pedal acts on each side of the chassis upon a rod fixed to the free end of a lever which is pivoted to the extremity of the shackle and a second rod is connected to the extremity of a crank keyed upon a shaft mounted on the axle and actuating the brake located upon the same side as said crank, the other extremity of this second rod being connected to the said lever at a point intermediate of the length of this latter. In this form of execution, the ratio between the distance between the pivot of the lever and the point thereon upon which the first rodis hinged, and the distance between this latter point and the point where the second rod is hinged, is equal to the ratio between the total length of the spring and the length of the spring comprised between the forward carrier-arm and the point where the spring is fixed tothe axle.

The invention is shown diagrammatically 'ROIBERT EMILE CHARLES DELEVOYE, OF-

OF NEUILLY-SUR-SEINE, FRANCE, ASSIGNOHS TO SOCIETE ANONYME DES relates to a brakemovements of the free end of PATEN oFFicE.

PARIS, AND EMILE ALBERT FRANQOIS DU- SS 86 CIR, OF LEVALLOIS-PERRET, SEINE,

BRAKE-AGTUATING MECHANISM.

3, 1923. Serial No. 610,493.

and by way of example in the accompanying drawing in which:

.Fig. 1 shows an actuating mechanism for the front brakes of automobiles;

Fig. 2 is a section along line 22 of Fig. 1;

Fig. 3 shows parts of an actuating mecha-' IllSIIl, similar to that of Fig. 1, but slightly modified First of all the invention will be described with reference to Fig. l: A shaft E parallel to the axle N and journalled in the chassis Fig. 4 is a sect1o'n along line4of Fig. 3.

of the vehicle is actuated by a pedal A in any suitable manner and, for example,

movements caused to take place conjointly through the intermediary of a compensating lever. Each lever F actuates, by means of a rod H a lever K oscillating about the axis L of the springshackle'L pivoted at L to the chassis, as usual." This lever K is connected to the lever O by a rod H pivoted to the extremity of the lever O and to the central point 6 of the length of the leverK.

The spring M is mounted in the usual manner in the spring carrier-arm and is fixed to the axle N. Its free end is pivoted at L- to the spring shackle L. The lever O is keyed upon a rock shaft 0 mounted on the axle N. The shaft 0 actuates the brake situated upon the same side as said shaft by means of a suitable device.

The method of operation of this device is as follows: VVhen the spring M yields, the lever 0 moves towards the shaft E, but if it is assumed that the axle N is fixed to the central point in the length of the spring M, the horizontal movement of the point a about which the lever K pivots is double that of the axle N and of the lever O, which is forced to take part in the movement of the axle N. The horizontal movements of the points it and Z2 will therefore be in the ratio of two to one, which is the ratio of the lever arms a, c and 0;, b. The point 0 there:

such a manner as to obtain a suitable relation between the lengths a, Z) and a, 0.

The invention has only been shown and described by way of a purely explanatory example, which is in'no way limita-tive, and it is to be understood that it is applicable to other cases than the one selected way of example. In a general way, it is applicable to the actuation of any organs fixed.

upon a movable support connectedby a leaf spring to a fixed frame which carries the de vice for actuating said organs.

Furthermore, the details of the actuating mechanism described, could be modifiedaccording to practical requirements without departing from. the spirit of the invention. For instance, the oscillating link L of the spring M could be replaced by a slide L having a rectilinear movement as shown in Figs. 3 and 4 which are self explanatory.

We claim: 1'. A brake actuating mechanism comprising in combination with a chassis: a suspension spring for an axle, a movable support for the free end of said spring, a brake pedal mounted on said chassisya brake-- mechanism for wheels mounted on said axle, rods connecting said brake pedal to said brakemechanism, and means pivotally connect-ed to said movable support, at the point of connection thereof with the free end of the spring, for nullifying the effect ofthe oscillations of saidspring upon said rods.

2. A brake actuating mechanism comprising in combination with a chassis: a suspension spring, a brake-pedal, a movable arm connected to said chassis and to which the free end of said spring is connected, a

brakeoperating lever, a link pivoted to said arm, a rod having its ends connected to said link and to said brake-operating lever, and a second rod connecting said brake pedal and said link.

3. A brake actuating mechanism comprising in combination with a chassis: a suspension spring, a brake-pedal, a movable arm pivoted to said chassis and to which the free end of said spring is connected, at

brake-operating lever, a link. pivoted to said nected to said link and to said brake-operat ing lever, and a second rod connecting said brake pedal and said link, the ratio between the distance of the point at which the link is pivoted and the point thereof at which the first rod is connected, and the distance between this latter point and the point where the second rod is connected being equal to the ratio between the total length of said spring and the length thereof comprised between its point of direct connection to the chassis and the pointwhere said spring is fixed to the axle.

ROBERT EMILE CHARLES DELEVOYE. EMILE ALBERT FRANQOIS DUMAINE. 

